It's entirely likely they do. However, the work done farming serves a different purpose than strength training. Farming requires the strength and endurance to

It's entirely likely they do. However, the work done farming serves a different purpose than strength training. Farming requires the strength and endurance to do the work day after day, but there is no particular emphasis on strength beyond what is necessary to do the work. Training for strength differs because the emphasis is developing the ability to lift more weight each session. Endurance is not particularly important because the interval for training strength is short. 3 to 5 repetitions, followed by a break. Will a farmer be able to outlift a novice or even intermediate weightlifter? It's entirely possible. Will a farmer be able to outlift an advanced power lifter or olympic lifter who is approaching the top of they physical potential? Not likely. The farmer is adapted for a different type of work.